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Lettera .Patent No. 71,452, dated .November 26, 1867.

t. IMPROVED GONGEALED HINGE.

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` of this specification, and represent, in-` Figure 1,`a perspective view, Figure 2 a top view, and in d Figure 3 a transverse section. p i This invention relates to an improvementlinwhat are commonly called concealed hinges, and such as are 1 thienplate. i p l `j"acczompanying drawings.`

,i ,and through this projection a screw, h, is passed, to secure the arm E to the plate B, fed that byremoving :the

screw t,`.the door may be easily removed, and yet cannotbe accidentally detached.

struction.. i

i tersv Patent, isi p i Securing the `arm E to the plate B by passing the end d through, und so 'as to bear against the shoulder a, and so-that the projection e will rest upon the inclined seatf, and there secured by nicansof the screw h, or its equivalent, substantially as herein set forth. l i

d WM.` Hu COOPER. A Witnesses: p p d JOHN E. EAnLE AL J. TIBBITS.

i encuen` R. GABY AND'WILLIAM 1= r.00`o1 nn, `or NEWT run/Eu00N-` Beitknown that we, Gnonen R. OADY and WILLIAM H. Coornn, of New Haven, in the countyof New Haven', and State of Connecticut, have invented a new `Improvement in Concealed;Hingepandwe do hereby declare the following, when taken in connection with the accompanying! drawings, and' `the letters ohreferencc l marked thereon, yto ybe a full, clear, and exact description of the same, andwhch said `drawings constitn tefpart;d`

generally used for the hanging of carriagedoors` and consists in the manner of securing the swinging-emite i d `To `enable others to construct our improvement, we will proceed to descrihc the salue,ia`s illustrated in the i Agis the onevplate,;whih is fixed to the jamb or door-post, and B the other plate`,"whicl1`is .fixe-d tothe door." d d i in the usual manner. From the plate Mears` C extend inward, lin the end of which isarranged a pivot,D, and to the plate Bis fixed an arm, E, extending throughan opening in the plate B, audvpivotedto thelears'Q'at l. in the usual manner. 1 Thus far the hinge is of common construction. Various devices haveyhecn` arranged for` securing `the arm'E to the plate B, so that the door may be easily detached, and yet not accidentally lso; but to" p all such there are greater. or less objections, which` our invention entirely overcomes. We foi-in an openingl throughthe plate B, through which the end d of the arm E is passed, as seen iniig. `3, and so as1to set against` i a`shoulder,'a, and upon the plate'B 4is formed aninclined seat, f, to which-a projection,` e,on the armE, is fitted, d d

This construction is cheap and simple, and bviates manydiiiiculties existingin hinges ofcommon con- Havingthus fully described our invention, `what wc claim as new anduseful, `and dcsirejto secure hy Leti 

